Gyrating driving mechanism.



J. B. CORNWALL.

GYRATING DRIVING MECHANISM.

APPLICATION man AUG.I4, 1915.

Patented June 27, 1916.

2 SHEETS-SHEET I Snow stow B. CORNWALL.

GYRATING DRIVING MECHANISM. APPLICAflON FILED AUG-14, 1915- 1 1 88,903Patented June 27, 1916.

2 SHEETS-SHEET 2- an n;

JOHN B. .OOBNWALL, OF 'MOLINE, ILLINOIS, ASSIGNOR '1'O BARNARD AND LEASMANU- v FACTURINGOOMPANY, F MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

GYRATING DRIVING MECHANISM.

messes.

Specification of Letters-Patent; Patented J 27 1915 Application filedAugust 14, 1915. Serial No. 45,505.

This invention relates to driving means.

for imparting a gyratory motion to bodies or arts of machines, and isparticularly '15 designed for use in connection with socalled Plansifterbolting machines.

The principal object of the invention is to obviate the objectionablejarring, shaking or vibrations ordinaril from the gyratory body to t ebuilding in which same is installed. There are now in general cipaltypes of. g'yratory drives for plansifters. One of these commonly knownas the rigid type drive insures that the gym- I tions of the moving bodyshall be practically uniform when the machine is 111 operation, and thework of the machine is thereby rendered more uniform, but such' .30rigid drive produces annoying vibrations and jarring of the building inwhich the ma chine having such a drive is installed. The other commonlyknown as the vibro-motor drive does not impart uniform or reliablegyratory motions to the moving body, and because of the variations inmovement the work of the machine is rendered unequal or defective.

The present invention aims to retain the 40 advantages and overcome thedefects of both the aforesaid types of drives, andto provide a dri ingmechanism whereby the gymtory movements imparted to the sieve or otherobjects can be maintained constant anduniform, and the' transmission ofobjectionable shocks or vibrations entirely eliminated, or reduced tosuch a ininirnumthat the objections to and annoyances arising from theuse of plansifters as hereto. fore-constructed will be obviated.

V The invention in brief consists in novel .means for driving atingbodies, suchas plansifter sieves an the hke, said driving means beingfsoconstructed and counter- 55 balanced as to in itself take up the strainselevation of the transmitted use two prinmovably mounted, as hereina ofthe socket 1 of centrifugal force and obviate jarring and vibration, andbeing also flexible so that the degree of gyratory motion imparted fromthe driving shaft to the driven object may be varied. c I will explainthe invention as employed 1n connection with a well known type ofplansifter flour bolting machine, and set orth in the claims thefeatures and combmatlons of parts for which protection is as desired. Iy

In the drawings: Fi re 1 is a sectional elevation of a plansi er with adriving mechanism embodying my invention; Fig.

is an enlarged top pkla'n viewfof the driva mg mechanism detac ed; Fig.3 is a side arts illustrated in Fig. 2; and Fig. 4 is a etail bottomplan view of a art of the driving mechanism.

eferrlng to the drawings, A designates m the sieve box of a plansifter,which may be suspended by rods B in the usual manner from over-headsupponts C in the building in which the machine is to be used.

-;Below the sieve box is the driving m'echaan nism which in generalappearance resembles the so-called rigid type drive, and in cludes abase member E in which is a vertical driving shaft having its lower endmounted on a step-bearing G in the base, as and journaled near its upperend in adjustable bearings F in the base member. A pulley H is attachedto the upper end of said v.

shaft by which it can be rotated.

Attached to the underside of the sieve'w box is 9. depending pin or studshaft J which engagesa ,member connected with the shaft D; so thatwhenthe shaft 1) is rotated a Eyratory motion is imparted to the sieveox. V a y The parts thus far referred to are, or may be, similar tothose commonly used on plansifters and needno further detailedexplanation herein. v

The stud J depends into a socket or rewe cess 1 in a casting 1 (see Fi2) which is r explained, upon shaft- D. The operative engagement betweencasting l-and stud J maybeadjust ed by means elf-bearing plates 3 engawe the sides of the stud and supporte .b means of bolts 3 tapped throughhe wall s The "1 is provided'at one side of socket 1! mt an a 'ustableweight 2; and 3110 said weight can be adjusted toward or from the stud Jby means of a threaded shaft 2 journaled in the casting 1, as shown. Theweight is shown as provided withv an opening in which is confined a nut2, threaded on the shaft 2,'so that the nut travels along the shaftwhenthe latter is rotated, thereby shifting the weight to or from the studJ. The shaft2 has a squared outer end by which it can be turned by awrench or other suitable tool, to adjust the weight.

The casting l is shown as provided with sleeves l at its sides by whichit is slidably supported on rods 4 mounted between studs 5, 5 on theupper surface of a casting or.

plate 5 mounted upon the upper end of the.

shaft D, and preferably rigidly attached thereto in any suitable manner,as by bolts 5, as indicated in Fig. 1. Springs 44 are strung on'rods 4between'the studs 5 and the adjacent ends of the sleeves 1 ,'andnormally tend to press the casting 1 in a direction away from the studs5.

The plate 5 is provided at one end, below the weighted end of the plate1, with an adjustable weight 6 having a slot 6 in which is confined a'nut 6 threaded on a shaft 6 journaled in lugs or flanges depending fromthe plate 5; and by turning shaft 6 the nut 6 is traveled along theshaft and the weight 6" adjusted toward or from the shaft D.

The parts are so adjusted that when the shaft D is rotated the stud Jwill become more or less eccentric to the axis of the shaft D andthereby impart the desired extent of gyratory or orbital motion to thebody or sieve box. The construction is such as will allow the sieve boxwhen the machine is in operation to press the stud J in a direction tocompress the springs 4 The momentum of the sieve box tendsby centrifugalforce to further increase the eccentric displacement of the stud Jrelative to the shaft D,- but this is opposed by the springs l and byadjusting the weight 2 any excessive centrifugal force exerted by thesieve box upon the springs 4 can be counterbalanced or neutralized.

The weight 6 is adjusted to counterbalance or neutralize the centrifugalforce tending to eccentrically displace the shaft D in its bearings whenthe machine is in operation; and to relieve the plate 5 and shaft D ofthe lateral pressure which is exerted by centrifugal force through theplate 1 from the sieve box against the springs 4 when the machine is inoperation. 3 By the described construction and arrangement of the partswhen the machine is in operation motion is transferred from the shaft Dto the stud J and centrifugal force tending to unduly displace the sievebox is compensated for or neutralized by.

the weights when properly adjusted.

The construction, above dGSCI'lDGCl and' illustrated in the drawingswill when properly adjusted automatically take care of and compensatefor the eccentric thrust or pressure exerted by the centrifugal force ofthe sieve box through stud J against its bearings in plate 1, and allsuch strains will be taken u within the drive, and obviate orpractically reduce to an immaterial factor the vibration and jarringwhich would be transmitted by the old .type of plansifter drive. v

WhatI claim is:

1. Means for imparting gyratory motion to objects, comprising a drivingshaft, a driven member eccentric thereto and movable transversely ofthedriving shaft, means adapted to resist the lateral movement of saiddriven member due to centrifugal force, and means to counteract orneutralize excessive effects of centrifugal force.

2; In means for imparting gyratory mo 7 tion to objects, a driven sha abody to be gyrated, a stud connected with said body and operativelyengaged with said driving shaft, spring means for resisting thecentrifugal force tending to shift the stud eccentrically of the drivenmember when the machine is in operation, and adjustable teracting theeffect of excessive centrifugal force.

4. In means for imparting gyratory motion, a driven shaft, a memberrigidly connected with said driving shaft, av second member slidablymounted upon said rigid member and movable transversely of the shaft; abody to be gyrated, a stud connected with said body and engaged withsaid transversely movable member, spring means resisting the centrifugalforce tending to-shift the movable member upon the fixed member when themachine is in operation, and means connected with said movable member tocom ensate for and neutralize excessive centri ugal force.

5. In a gyratory drive for plansifters an the like, the combination of adriving shaft, a member fixedly attached thereto, a transversely movablemember mounted upon said fixed member, and springs adapted to retain themovable member in normal position and resist the action of centrifugalforce when bod and havin I y it the machine is in operation; with abodygf weight on said movable casting, with a sieve a stud attachedthereto having a rotatable engagement with said movable member, andmeans mounted on 'the movable member adapted to counterbalance orneutralize excessive thrust of the gyrating body when the machine is inoperation.

6. In a gyratory drive for plansifters and the like, the combinationof adriving shaft,

a member fixedly attached thereto, a transversely movable member mountedupon said fixed member; springs mounted upon the fixed member adapted toretain the movable member in normal position and to resist the action ofcentrifugal force when the machine is in operation; with a body, a studattachedthereto axially parallel with the driving shaft and having arotatable engagement with said movable member, and weights mounted onthe said members to counterbalance or neutralize excessive thrust of thegyrating body when the machine is in operation. 1

7. In a drive 'mechanism for plansifters and the like, the combinationof abase, a shaft journaled therein, means for rotating said shaft; aplate attached to the upper end of said shaft, a movable plate slidablymounted on the fixed plate, springs for holding said movable plate innormal position, a sieve body, a stud attached to said a rotatableengagement with said mova plate, and an adjustable counterbalancingweight on said movable body and a'stud attached to said body havingarotatable engagement with' said movable casting, substantially asdescribed:

9. In a drive mechanism for plansifters and the like, the combination ofa base, a

shaft journaled therein, means for rotating said shaft; a plate attachedto the upper end of said shaft, a movable plate slidably mounted on thefixed plate, rods mounted on the fixedplate, springs on said rods forholding said movable plate in. normal posi tion, a sieve body, a studattached to said body and havin A a rotatable. engagement with saidmovale plate, and adjustable 'weights on said plates whereby when themachine is in operation the shocks and jars due to the gyratorymovements of the body are com ensated for between said body and thedriving shaft. 10. In a drive mechanism for plansifters and the like,the combination of a base, a vertical shaft journaled therein, means forrotating said shaft; a casting mounted transversely of and upon theupper end of said-shaft and fixedly attached thereto, an adjustableweight on said casting, a second casting slidably mounted on the fixedcasting, rods mounted on the'first casting engaged by sleeves on themovable casting for guiding and holding the latter, springs on saidrods; for holding said movable casting in normal position, and anadjustable weight on said movable casting; with a sieve body plate,substantially as and for the purpose *to be gyrated, and a stud attached,to said described.

8. In a drive mechanism for plansifters and the like, the combinationofa base, a vertical shaft journaled therein, means for rotating saidshaft; a casting mounted transversely of and upon the-upper end of saidshaft and fixedly attached thereto, an

adjustable weight on said casting, a second casting slidably mounted onthe fixed cast ing, springs fps holding said movablecasting in normalPOSltlOIl andan adjustable body ,and axially parallel with the drivenshaft said stud havin a rotatable engages ment with said mova le castingwhereby ,when the machine is in operation the shocks and jars due to thegyratory movements of ,the body are compensated forbetweensaid body andthe drivin shaft.

In testimon that claim the foregoing as my own, I a mysignature JOHN B.CORNWALL;

